321420033020021 has 12 divisors (see below), whose sum is σ = 366364783825920. Its totient is φ = 281079866929680.

The previous prime is 321420033020017. The next prime is 321420033020143. The reversal of 321420033020021 is 120020330024123.

It is not a de Polignac number, because 321420033020021 - 2² = 321420033020017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321420033020221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50049830645 + ... + 50049837066.

It is an arithmetic number, because the mean of its divisors is an integer number (30530398652160).

Almost surely, 2^{321420033020021} is an apocalyptic number.

It is an amenable number.

321420033020021 is a deficient number, since it is larger than the sum of its proper divisors (44944750805899).

321420033020021 is a wasteful number, since it uses less digits than its factorization.

321420033020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100099667756 (or 100099667743 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 321420033020021 its reverse (120020330024123), we get a palindrome (441440363044144).

The spelling of 321420033020021 in words is "three hundred twenty-one trillion, four hundred twenty billion, thirty-three million, twenty thousand, twenty-one".